Yes. That's a histogram of the times my furnace is on and off during the day. The nest is easily one of the coolest things you can do for your house. Besides being able to adjust your thermostat from your phone or tablet, it also records your performance and how much energy you are saving. Basically the first week you have it, you set the temp when you wake up and leave for work, then when you get home and when you go to bed. After a while it learns your routine and how long your particular house takes to warm up vs furnace runtime (or vice-versa with AC) and begins turning on your furnace to reach that temperature by the time you would normally be turning the thermostat up. So for example if you normally wake up at 6am for work, it may turn itself up at 5:45 to hit your target temperature by 6. And after a while you don't have to touch it at all. (It's also easy to edit via your cellphone if your schedule changes for a few days and you don't want it to run the usual program.) also it has infrared and acoustic sensors that determine if nobody is home for a few hours and it will automatically go into away mode and lower itself to a set "low" temp. It also downloads the weather and compensates itself for outside temp.
I don't know what that part has to do with me necessarily... I basically want the wifi/learning portion... the wifi moreso... I am going to be traveling now for work and being able to dial my heat up or down before I get home or while I am away seems neat to me.
